/* $OpenBSD: dapmic.c,v 1.2 2022/04/06 18:59:28 naddy Exp $ */ /* * Copyright (c) 2021 Mark Kettenis * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include extern void (*cpuresetfn)(void); extern void (*powerdownfn)(void); /* Registers */ #define EVENT_A 0x06 #define CONTROL_F 0x13 #define CONTROL_F_WAKE_UP (1 << 2) #define CONTROL_F_SHUTDOWN (1 << 1) #define COUNT_S 0x40 #define COUNT_S_COUNT_SEC 0x3f #define COUNT_MI 0x41 #define COUNT_MI_COUNT_MIN 0x3f #define COUNT_H 0x42 #define COUNT_H_COUNT_HOUR 0x1f #define COUNT_D 0x43 #define COUNT_D_COUNT_DAY 0x1f #define COUNT_MO 0x44 #define COUNT_MO_COUNT_MONTH 0x0f #define COUNT_Y 0x45 #define COUNT_Y_MONITOR (1 << 6) #define COUNT_Y_COUNT_YEAR 0x3f #define ALARM_MO 0x4a #define ALARM_MO_TICK_WAKE (1 << 5) #define ALARM_MO_TICK_TYPE (1 << 4) #define ALARM_Y 0x4b #define ALARM_Y_TICK_ON (1 << 7) struct dapmic_softc { struct device sc_dev; i2c_tag_t sc_tag; i2c_addr_t sc_addr; struct todr_chip_handle sc_todr; }; int dapmic_match(struct device *, void *, void *); void dapmic_attach(struct device *, struct device *, void *); const struct cfattach dapmic_ca = { sizeof(struct dapmic_softc), dapmic_match, dapmic_attach }; struct cfdriver dapmic_cd = { NULL, "dapmic", DV_DULL }; uint8_t dapmic_reg_read(struct dapmic_softc *, int); void dapmic_reg_write(struct dapmic_softc *, int, uint8_t); int dapmic_clock_read(struct dapmic_softc *, struct clock_ymdhms *); int dapmic_clock_write(struct dapmic_softc *, struct clock_ymdhms *); int dapmic_gettime(struct todr_chip_handle *, struct timeval *); int dapmic_settime(struct todr_chip_handle *, struct timeval *); void dapmic_reset(void); void dapmic_powerdown(void); int dapmic_match(struct device *parent, void *match, void *aux) { struct i2c_attach_args *ia = aux; return (strcmp(ia->ia_name, "dlg,da9063") == 0); } void dapmic_attach(struct device *parent, struct device *self, void *aux) { struct dapmic_softc *sc = (struct dapmic_softc *)self; struct i2c_attach_args *ia = aux; sc->sc_tag = ia->ia_tag; sc->sc_addr = ia->ia_addr; sc->sc_todr.cookie = sc; sc->sc_todr.todr_gettime = dapmic_gettime; sc->sc_todr.todr_settime = dapmic_settime; todr_attach(&sc->sc_todr); printf("\n"); if (cpuresetfn == NULL) cpuresetfn = dapmic_reset; if (powerdownfn == NULL) powerdownfn = dapmic_powerdown; } uint8_t dapmic_reg_read(struct dapmic_softc *sc, int reg) { uint8_t cmd = reg; uint8_t val; int error; iic_acquire_bus(sc->sc_tag, I2C_F_POLL); error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, &cmd, sizeof cmd, &val, sizeof val, I2C_F_POLL); iic_release_bus(sc->sc_tag, I2C_F_POLL); if (error) { printf("%s: can't read register 0x%02x\n", sc->sc_dev.dv_xname, reg); val = 0xff; } return val; } void dapmic_reg_write(struct dapmic_softc *sc, int reg, uint8_t val) { uint8_t cmd = reg; int error; iic_acquire_bus(sc->sc_tag, I2C_F_POLL); error = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, &cmd, sizeof cmd, &val, sizeof val, I2C_F_POLL); iic_release_bus(sc->sc_tag, I2C_F_POLL); if (error) { printf("%s: can't write register 0x%02x\n", sc->sc_dev.dv_xname, reg); } } int dapmic_clock_read(struct dapmic_softc *sc, struct clock_ymdhms *dt) { uint8_t regs[6]; uint8_t cmd = COUNT_S; int error; iic_acquire_bus(sc->sc_tag, I2C_F_POLL); error = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, &cmd, sizeof(cmd), regs, sizeof(regs), I2C_F_POLL); iic_release_bus(sc->sc_tag, I2C_F_POLL); if (error) return error; dt->dt_sec = (regs[0] & COUNT_S_COUNT_SEC); dt->dt_min = (regs[1] & COUNT_MI_COUNT_MIN); dt->dt_hour = (regs[2] & COUNT_H_COUNT_HOUR); dt->dt_day = (regs[3] & COUNT_D_COUNT_DAY); dt->dt_mon = (regs[4] & COUNT_MO_COUNT_MONTH); dt->dt_year = (regs[5] & COUNT_Y_COUNT_YEAR) + 2000; /* Consider the time to be invalid if the MONITOR bit isn't set. */ if ((regs[5] & COUNT_Y_MONITOR) == 0) return EINVAL; return 0; } int dapmic_clock_write(struct dapmic_softc *sc, struct clock_ymdhms *dt) { uint8_t regs[6]; uint8_t cmd = COUNT_S; int error; regs[0] = dt->dt_sec; regs[1] = dt->dt_min; regs[2] = dt->dt_hour; regs[3] = dt->dt_day; regs[4] = dt->dt_mon; regs[5] = (dt->dt_year - 2000) | COUNT_Y_MONITOR; iic_acquire_bus(sc->sc_tag, I2C_F_POLL); error = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, &cmd, sizeof(cmd), regs, sizeof(regs), I2C_F_POLL); iic_release_bus(sc->sc_tag, I2C_F_POLL); if (error) return error; return 0; } int dapmic_gettime(struct todr_chip_handle *handle, struct timeval *tv) { struct dapmic_softc *sc = handle->cookie; struct clock_ymdhms dt; int error; error = dapmic_clock_read(sc, &dt); if (error) return error; if (dt.dt_sec > 59 || dt.dt_min > 59 || dt.dt_hour > 23 || dt.dt_day > 31 || dt.dt_day == 0 || dt.dt_mon > 12 || dt.dt_mon == 0 || dt.dt_year < POSIX_BASE_YEAR) return EINVAL; tv->tv_sec = clock_ymdhms_to_secs(&dt); tv->tv_usec = 0; return 0; } int dapmic_settime(struct todr_chip_handle *handle, struct timeval *tv) { struct dapmic_softc *sc = handle->cookie; struct clock_ymdhms dt; clock_secs_to_ymdhms(tv->tv_sec, &dt); return dapmic_clock_write(sc, &dt); } void dapmic_reset(void) { struct dapmic_softc *sc = dapmic_cd.cd_devs[0]; uint8_t reg; /* Enable tick alarm wakeup with a one second interval. */ reg = dapmic_reg_read(sc, ALARM_MO); reg &= ~ALARM_MO_TICK_TYPE; reg |= ALARM_MO_TICK_WAKE; dapmic_reg_write(sc, ALARM_MO, reg); /* Enable tick function. */ reg = dapmic_reg_read(sc, ALARM_Y); reg |= ALARM_Y_TICK_ON; dapmic_reg_write(sc, ALARM_Y, reg); /* Clear events such that we wake up again. */ dapmic_reg_write(sc, EVENT_A, dapmic_reg_read(sc, EVENT_A)); dapmic_reg_write(sc, CONTROL_F, CONTROL_F_SHUTDOWN); } void dapmic_powerdown(void) { struct dapmic_softc *sc = dapmic_cd.cd_devs[0]; uint8_t reg; /* Disable tick function such that it doesn't wake us up. */ reg = dapmic_reg_read(sc, ALARM_Y); reg &= ~ALARM_Y_TICK_ON; dapmic_reg_write(sc, ALARM_Y, reg); dapmic_reg_write(sc, CONTROL_F, CONTROL_F_SHUTDOWN); }